<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col :span="4">
                    <el-button type="primary" @click="addDialogVisible=true">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                 <template slot-scope="scope">
                     <el-row :class="['bdbottom',i1===0 ? 'bdtop' :'','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                      <!-- 渲染一级权限 -->
                      <el-col :span="5">
                       <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                       <i class="el-icon-caret-right"></i>
                      </el-col>
                      <!-- 渲染二级和三级权限 -->
                      <el-col :span="19" >
                        <!-- 通过for循环嵌套渲染二级权限-->
                        <el-row :class="[i2 === 0 ? '':'bdtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id" >
                            <el-col :span="6">
                                <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <el-col :span="18">
                               <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                            </el-col>
                        </el-row>
                      </el-col>
                     </el-row>

                     <!-- <pre>
                      {{scope.row}}
                     </pre> -->
                 </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName">
                </el-table-column>
                <el-table-column label="角色描述" prop="roleDesc">
                </el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeUserById(scope.row.id)">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 添加用户对话框 -->
        <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
            <!-- 内容主体区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="90px" >
               
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
        <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="adduser">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改用户对话框 -->
        <el-dialog title="修改用户" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="90px">
                 <el-form-item label="角色名称" prop="roleName">
                     <el-input v-model="editForm.roleName" ></el-input>
                </el-form-item>
                 <el-form-item label="角色描述" prop="roleDesc">
                     <el-input v-model="editForm.roleDesc" ></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editUserInfo">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配权限对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightslist" :props="treeProps" 
            show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return {
            //控制添加用户对话框的显示与隐藏
            addDialogVisible:false,
            //添加用户的表单数据
            addForm:{
                roleName:'',
                roleDesc:''
            },
            //添加表单的验证规则
            addFormRules:{
                roleName:[
                    {required:true,message:'请输入角色名',trigger:'blur'},
                    {
                        min:1,
                        max:10,
                        message:'角色名长度在1-10个字符之间',
                        trigger:'blur'
                    }
                ],
                roleDesc:[
                    {required:true,message:'请输入角色描述',trigger:'blur'},
                    {
                        min:1,
                        max:20,
                        message:'角色描述长度在1-2个字之间',
                        trigger:'blur'
                    }
                ]
            },
            //控制修改用户对话框的显示与隐藏
            editDialogVisible:false,
            //查询到的用户信息对象
            editForm:{},
            //修改表单的验证规则对象
            editFormRules:{
                roleName:[
                    {required:true,message:'请输入角色名',trigger:'blur'},
                    {
                        min:1,
                        max:10,
                        message:'角色名长度在1-10个字符之间',
                        trigger:'blur'
                    }
                ],
                roleDesc:[
                    {required:true,message:'请输入角色描述',trigger:'blur'},
                    {
                        min:1,
                        max:20,
                        message:'角色描述长度在1-2个字之间',
                        trigger:'blur'
                    }
                ]
            },
            //获取角色列表数据
            rolelist:[],
            //控制分配权限对话框的显示与隐藏
            setRightDialogVisible:false,
            //所有权限的数据
            rightslist:[],
            //树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选择的id值
            defKeys:[],
            //当前即将分配权限的角色id
            roleId:''

        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
        //获取所有角色的列表
        async getRolesList(){
            const{data:res}=await this.$http.get('roles')
            console.log(res);

            if(res.meta.status !==200){
                return this.$message.error('获取角色列表失败')
            }
            this.rolelist=res.data
            console.log(this.rolelist);
        },
        //根据id删除对应的权限
        async removeRightById(role,rightId){
            //弹框提示用户是否删除
            const confirmResult = await this.$confirm('此操作将永久删除文件，是否继续?','提示',{
                cancelButtonText:'取消',
                confirmButtonText:'确定',
                type:'warning'
            }).catch(err=>err)

            if(confirmResult !== 'confirm'){
                return this.$message.info('取消了删除！')
            }
            // console.log('确认了删除');

            const {data:res}= await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

            if(res.meta.status!==200){
                return this.$message.error('删除权限失败!')
            }

            role.children=res.data
        },
        //监听添加用户对话框的关闭事件
        addDialogClosed(){
            this.$refs.addFormRef.resetFields()
        },
        //点击按钮，添加用户
        adduser(){
            this.$refs.addFormRef.validate(async valid=>{
                if(!valid) return
                //可以发起添加用户的网络请求
                const {data:res}=await this.$http.post('roles',this.addForm)
                if(res.meta.status !==201) {
                    this.$message.error('添加用户失败')
                }
                this.$message.success('添加用户成功')
                //隐藏添加用户的对话框
                this.addDialogVisible =false
                //重新获取用户列表数据
                this.getRolesList()
            })
        },
        //展示编辑按钮的对话框
        async showEditDialog(id){
            const {data: res} = await this.$http.get('roles/' + id)
            if(res.meta.status !==200){
                return this.$message.error('查询用户信息失败')
            }

            this.editForm=res.data
            this.editDialogVisible=true
        },
        //监听修改用户对话框的关闭事件
        editDialogClosed(){
            this.$refs.editFormRef.resetFields()
        },
        //修改用户信息并提交
        editUserInfo(){
            this.$refs.editFormRef.validate(async valid=>{
                if(!valid) return
                //发起修改用户信息的数据请求
                // console.log(this.editForm.roleId);
                const {data: res}=await this.$http.put('roles/'+this.editForm.roleId,{
                    roleName:this.editForm.roleName,
                    roleDesc:this.editForm.roleDesc
                })
                    console.log(res);
                if(res.meta.status !=200){
                    return this.$message.error('更新用户信息失败')
                }

                //关闭对话框
                this.editDialogVisible=false
                //刷新数据列表
                this.getRolesList()
                //提示修改成功
                this.$message.success('更新用户信息成功')
            })
        },
        //根据id删除对应的用户信息
        async removeUserById(id){
            const confirmResult=await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err=>err)

            //如果用户确认删除，返回字符串confirm
            //如果用户取消删除，则返回字符串 cancel
            // console.log(confirmResult);
            if(confirmResult !='confirm'){
                return this.$message.info('已取消删除')
            }
            // console.log('确认删除');

             const {data: res}=await this.$http.delete('roles/'+id)
             if(res.meta.status !==200){
                 return this.$message.error('删除用户失败')
             }
             this.$message.success('删除用户成功')
             this.getRolesList()
        },
        //展示分配权限对话框
        async showSetRightDialog(role){
            this.roleId=role.id
            //获取所有权限的数据
            const {data:res}=await this.$http.get('rights/tree')

            if(res.meta.status!==200){
                return this.$message.error('获取权限数据失败')
            }
            //把获取的权限数据保存到data中
            this.rightslist=res.data
            console.log(this.rightslist);

            //递归获取三节点的id
            this.getLeafKey(role,this.defKeys)

            this.setRightDialogVisible=true

        },
        //通过递归的方式，获取角色下所有三级权限id，并保存到defKey数组里面
        getLeafKey(node,arr){
            //如果当前node节点不包括children属性，则三级节点
            if(!node.children){
                return arr.push(node.id)
            }

            node.children.forEach(item=>this.getLeafKey(item,arr))
        },
        //监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys=[]
        },
        //点击角色分配权限
        async allotRights(){
            const keys=[
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            // console.log(keys);

            const idStr=keys.join(',')
            const {data:res}= await this.$http.post(`roles/${this.roleId}/rights`,{rids: idStr})

            if(res.meta.status !==200 ){
                return this.$message.error('分配权限失败')
            }

            this.$message.success('分配权限成功')
            this.getRolesList()
            this.setRightDialogVisible=false
        }
    }
    
}
</script>

<style scoped>
    .el-tag{
        margin: 7px;
    }

    .bdtop{
        border-top: 1px solid #eee;
    }

    .bdbottom{
        border-bottom: 1px solid #eee;
    }

    .vcenter{
        display: flex;
        align-items: center;
    }
</style>